Lost communication with the ECM

Tiny
KYLE POWELL
  • MEMBER
  • 2007 CHEVROLET COBALT
  • 2.0L
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 80,000 MILES
I hooked my car up to my scan tool and I have no communication to the ECM. What could be the reason I have no communication to it?
Thursday, August 17th, 2017 AT 1:19 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,940 POSTS
The main reason for no communication is a blown fuse to the ECM or BCM.

Here is the location of the fuse panel and a guide to help you check them:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If all fuses check out then I would suspect a bad ECM.

Please let us know what happens so we can keep helping you.

Cheers, Ken
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Friday, August 18th, 2017 AT 12:21 PM

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